Improvement in expansion-buckets for chain-pumps



LGFFIGE wirnnn', 'or sPIiIN"GFILLD,i ILLInoI's.

iMBRoi/EMENTIN ExPANslo'N-BUCKIETS FOR cHAl-N-PuMPs.

Specification forming part of Letters `Patent 1510.172316, 'dated J anuary. :25, 1876; application-filed .i

' July 15, 1,875. v

To all 'whom 'it may concern:

Be it known that I, DANIEL W. WITMER, of Springfield, in the county of Sangamon land State of Illinois, have invented a new and useful Improvement in Expansion-Buckets for ChaimPumps; and II do hereby declare that the following is a full and exact description of the same, reference being had to the accompany drawings and to the letters of reference marked thereon.

The object of my invention is the production of an expansion-bucket for chain-pumps which shall provide simple means for dropping the water back into the well when the pump is not inl use, and also furnish a simple contrivance' for expanding and contracting the bucket without detaching it from the chain, and without'twistin g or changing in the -least the tension of the chain; and my invention therein consists, principally, in the peculiar means for expanding and contracting the rubber packing; and, further, in the -peculiar v means for dropping the water, all as more fully hereinafter explained.

To enable others skilled in the art to manufacture my device,*I now proceed to describe the same in connection with the drawings, in

which- Figure 1 is a side elevation of the bucket; Fig. 2, a central vertical section of the same; Fig. 3, a separate view of the central bolt.

Like letters denote. similar parts in each Y figure.

A represents the central bolt, having welded on each end an eye, a, for attaching it to the chain, and near one end a shoulder, a'. This bolt has cut in its side a groove, b, extending its entire length through the shoulder a.

B is a metallic washer slipped on the bolt A, and abutting against the shoulder a. The washer is made largeenough to turn freely upon the bolt.

C is a pipe or sleeve slipped onto the boltconstruction. It is slipped over the sleeve C, and abuts against the washer B.

E is a nut, which screws on the end of the sleeve, and presses against the packing D.

This nut is circular in outline, and smooth on its outer surface. Teeth d are formed onv the under surface of the nut when it presses on the packing.

In using chain-pumps it isa necessity that the water should run back into the wellwhen ation.

The operation of expanding the rubber packing of this bucket is as follows: The link attached to the lower eye of the bucket is taken firmly in the left hand, or

grasped by a wrench. The Vrubber packing is then taken in the right hand, and turned inv the direction of the screw-thread. The teeth.-

(n the nut engage with the upper surface of the rubber packing, and by them the nut is turned. -The more the packing is turned the greater is the pressure on the nut, and consequently the teeth hold tighter. The under side of the packing pressing on the loose washer causesv it to turn also, thus relieving the central bolt from vany tendency to twist the chain. This is done without detaching the bucket from the chain, and, as will be readily seen, without changing the tensionofl or twisting the chain, as' in ordinary .expansion-buckets.

. This bucket could be constructed for the v 1. In combination, the bolt Av, provdedwith ,l

the eyes a, the paekingD, the nut E. and the loose washer B, substantially as described and shown.

2. In combination, the bolt A, provided vwith the eyes a, the packing D, the nut'E, Washer B, and sleeve C, substantially as described and shown.

3. The combination, of the bolt A, having the eyes a and groove b, the sleeve C, andthe packin g, substantially as described rand. shown. 4. The expansion-bucket 'for chain-pumps described, consisting of thel bolt A, having eyes a, shoulder ql, and groove b, the rubber packing D, the `screwr-threadedi sleevei O', se

"cured to fthe boltiby the pin c, theloose` washer l B, and nut E, having the` teeth d, when the nseveral parts are constructed substantially as described and shown.

This specification signed and witnessed this 29th da-y of June, 1875.

v DANIEL W. WITMER. Witnesses:

SAMUEL D.. SoHoLEs, T. C. MATHER. 

